When is too much sleep bad for you? There are distinct physical side effects from over-sleeping. This disorder is still under study, yet much has been determined in the last few years. Over-sleeping can indicate deeper health issues that remain unaddressed. Sleep apnea is also a confusing double-edged issue. With sleep apnea, a person stops breathing intermittently and so reduction in oxygen comes into play causing a need for more sleep. Another side effect of sleep apnea is un-restful sleep.
Diabetes has been seen as a disease that can cause and perhaps be caused by over sleeping. Researchers have found the links, but are still wondering about how they inter-relate. Heart disease and early death have also been linked to too much sleep. Some considerations about this have found that people who are low on the socio-economic scale are more likely to sleep too much. Some researchers pose that this group receives inadequate health care and so may be having unaddressed health issues that cause this problem of craving too much sleep.
Doctors also site depression as a major cause of over-sleeping. This can also lead to obesity which causes a too-much-sleep spiral. A recent study revealed people sleeping for nine or ten hours a night were 21% more likely to manifest weight gain over a six year period, ending with an obese condition difficult to turn around. According to the study sleep remained the factor of causation when food intake and exercise were accounted for. When this study asks is too much sleep bad for you, the general answer was yes.
Too much stress and tension can also lead to over-sleeping and some used to pose that it was an escape means to hide from problems, however, today authorities seem to feel it has more to do with unhealthy spirals of disease and the difficult to notice ill-effects of undiagnosed underlying health problems.
Stress and tension cause disease and sleep is often one of the ways the body attempts to heal itself, therefore, the sleep cycle process is not one to take lightly. If sleep issues seem to part of your concern, it would be good to speak with your doctor about the potential cause. Some medications will trigger deep sleep cycles that last seemingly too long. Underlying mental or physical health issues that have become exacerbated by stress can also be a cause. Speaking with your health practitioner can also reduce what stress you may be generating on your own just worrying about the problem. Alcohol use is a big factor that contributes to over sleeping. Other anxiety medications as well as recreational drugs will do the same.
Is too much sleep bad for you? This is a relative question. Sleep is the body working to heal and restore itself. Too much sleep indicates an underlying problem. Is it bad to sleep too much? Yes and no. Consult your doctor and address the underlying issues.

[...] how you need to make sure you get plenty of sleep, but people rarely think to question, “Is too much sleep bad for you?” Most adults are required 7 to 8 hours of sleep a day but if you get more sleep then that on [...]